51 to 75 of 447 Permanent API Design Jobs

Description Role Summary : We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands-on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilities-spanning digital custody, tokenization enablement, digital transfer agency … work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet our business and technical requirements. Role Description: Design, develop, and maintain Java backend services and REST APIs that support digital asset product flows (custody, tokenization, TA, digital cash/settlement) and integrate ...

with Account Executives, Customer Success Managers, and Service Delivery to solve complex identity challenges for enterprise customers, leading efforts from the discovery and solution design through to evaluation for prospects and existing customers. You’ll translate technical and business requirements into scalable solutions, lead technical engagements, and ensure customers … Advise on best practices across identity, compliance, fraud, risk and integrations, adapting your approach to different customer contexts and levels of technical depth Strong API expertise (REST, API design, OAuth, API keys, JSON/XML) with the ability to translate complexity into clear, actionable solutions Comfortable ...

enterprise and partner ecosystems. The position also plays a key role in shaping industry best practices and representing the organisation externally. Enterprise & Ecosystem Architecture Design and oversee the implementation of enterprise-wide software architecture, spanning internal platforms, cloud environments, and external partner ecosystems Develop “big picture” architectural frameworks … adherence to security, compliance, regulatory, and quality standards Identify and mitigate long-term architectural risks (e.g., vendor lock-in, scalability constraints, regulatory exposure) Technical Design & Solution Development Conduct research, analyse data, gather requirements, and define end-to-end solutions Create architectural artefacts representing system functions, integrations, and user interfaces ...

contribute across multiple domains, partnering with business and technology stakeholders to deliver strategic platforms that enable the firm’s objectives. Job Responsibilities Lead the design, development, and delivery of innovative software solutions, solving complex problems with creative and forward-thinking approaches Build and maintain high-quality, secure, and production … eliminate recurring issues, improving platform stability and efficiency Develop and implement data-intensive and statistical solutions using Java/Scala on large-scale datasets Design and build AI-enabled applications, including AI Agents and agentic workflows Work across hybrid data ecosystems (AWS, Databricks, Kubernetes) Ensure code quality through unit ...

Summary Solution Architect AWS | Microservices & Event-Driven Architecture Cambridge - Hybrid - 2 days The Opportunity We're looking for an experienced Solution Architect to design and lead the implementation of scalable, cloud-native systems on AWS. You'll work across engineering, product and business stakeholders to define architecture for distributed … business goals, run architecture reviews and threat modelling sessions, and own the technical roadmap across multiple product domains. Lead service decomposition using Domain-Driven Design - defining bounded contexts, inter-service contracts, and REST/GraphQL/gRPC APIs - and set patterns for resilience (circuit breakers, retries, bulkheads) and observability ...

that challenge and inspire you. Here's what a typical day might look like: Develop and maintain Symfony-based applications with clean, efficient code Design and implement RESTful APIs using API Platform or FOSRestBundle Build reusable bundles and Symfony components Integrate third-party services and APIs into applications … Optimize application performance and database queries Responsibilities Develop and maintain Symfony-based applications with clean, efficient code Design and implement RESTful APIs using API Platform or FOSRestBundle Build reusable bundles and Symfony components Integrate third-party services and APIs into applications Optimize application performance and database queries Write ...

based platforms, helping drive the transition to cloud-ready ASP.NET Core APIs, microservices, and Azure-native architectures.**Key Responsibilities****Technical Leadership*** Lead the design and development of applications using **C#, VB.NET**, ASP.NET Core, ASP.NET MVC, Web API, LINQ, and related .NET technologies.* Guide modernization of legacy **VB.NET … .NET Framework applications and services** into modern **C#, ASP.NET Core, and .NET 8+ API architectures** where appropriate.* Define and lead migration strategies for legacy **WCF/SOAP services**, including service decomposition, API design, security modernization, backward compatibility, and transition to RESTful and event-driven architectures.* Provide technical ...

drive high engineering velocity, this role offers an exceptional platform for technical leadership and impact.Key Responsibilities & Technical Leadership:Architectural Stewardship & Hands-On EngineeringArchitect, design, and deliver high-performance, resilient Java (21/25) and Spring Boot microservices powering core enterprise data ingestion, deduplication, and reconciliation engines.Lead the design … oversight across the full application stack, collaborating effectively with frontend engineers building modern React/TypeScript maintenance interfaces.Ensure seamless end-to-end integration, predictable API contracts, and consistent telemetry/monitoring across all tiers.Technical Profile & Qualifications:Required Technical Skills:7+ years of hands-on software engineering experience with deep ...

direction and architecture of your team's domain, balancing immediate delivery needs with long‐term platform scalability and maintainability. Drive architectural decision‐making through design reviews, technical proposals and Architecture Decision Records (ADRs). Design, build and evolve secure, scalable APIs and shared platform services used by customers … partners and internal engineering teams. Establish and champion authentication and authorisation patterns using industry standards such as OAuth 2.0, OpenID Connect, API Keys and mutual TLS (mTLS). Remain hands‐on in the code, contributing to the design and delivery of critical platform capabilities. Support the evolution ...

using Docker is desirable. Hands‐on experience or academic exposure to Python for data science or AI/ML development. Basic understanding of RESTful API design principles. Familiar with model development workflows, including training, evaluation and basic tuning. Exposure to tools such as Azure ML, Prompt Flow … vector search, embeddings, or retrieval techniques is desirable. Assists with basic ML pipeline configuration under guidance. Ability to write clear technical documentation and maintain API specifications using Open API 3.0+ Basic understanding of System Design and Architecture Basic understanding of microservices architecture and distributed system design. Familiarity ...

Architect and build end-to-end features across our React frontend and FastAPI backend, making sound technical decisions that balance speed with maintainability Design AI agent workflows using LangGraph for screening automation, RAG pipelines, and multi-agent orchestration Lead technical initiatives - own complex features from design to production … through code reviews, pairing, and technical guidance Shape engineering practices - contribute to architecture decisions, coding standards, and team processes Collaborate cross-functionally with Product, Design, Compliance, and other engineering teams to deliver impactful solutions Frontend: React, TypeScript, Material-UI Module Federation (Micro-frontend architecture) Vite, Vitest Python 3.13, FastAPI ...

Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery. We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical … expertise with people-centred design, we create solutions that deliver meaningful, lasting impact. Our consultants partner directly with client teams, embedding into organisations to understand their goals, challenges, and users. This collaborative approach enables us to deliver tailored solutions that drive measurable outcomes across public and private sectors. Past ...

formats (part-time, full-time, or contract) in a fully remote environment, with a strong focus on AI-assisted software engineering. Key Responsibilities Backend & API Architecture: Design and build backend applications and REST APIs using PHP 8+ and SQL databases while refining existing production systems. Integrations & Automation: Manage … Level: Strong commercial experience in backend engineering with proven independence in making architectural decisions. Core Technical Stack: Advanced proficiency in PHP 8+, SQL, REST API design/maintenance, Git, Linux, and Docker. Software Practices: Deep understanding of existing codebases, modern development workflows, and hands‐on comfort with ...

will be a hands‐on technical leader who defines direction, raises engineering standards, and delivers measurable product outcomes, all while remaining deeply involved in design and development. This is not a traditional people‐management or delivery‐management role—here, you will write code, architect solutions, lead complex projects … role is perfect for leaders seeking high‐growth, product‐driven environments, who are passionate about distributed systems, and who want to directly influence the design of secure, scalable, and resilient infrastructure while cultivating top engineering talent. What You’ll Do: Architect and design scalable, resilient, high‐performance backend ...

Senior Backend Product Engineer to join our Capital Markets technology team in London. This is a hybrid, hands‐on role: you’ll design, build and run systems across Pre‐Trade, Trade and Post‐Trade, covering Structured Investments, Equity IPOs, Hedging & Monetization, ETFs, and more. … tests, with good judgment about what to test at each level Strong experience with Spring (Boot, Data, Security), relational database design, REST API design, and Kafka or a similar event streaming platform Experience working AI‐first: using AI agents to build software, with an understanding ...

every trading day, across low-latency services, large-scale data pipelines, distributed compute, and the APIs and interfaces on top of them. Key Responsibilities Design, build, and own the firm's risk calculation and exposure aggregation services, from position capture through to delivered risk numbers. Develop real-time … operating production systems, with deep expertise in Python and at least experience in one systems language Strong grounding in distributed systems, concurrency, service design, and API design; you have owned systems in production, not just written code for them. Solid engineering discipline: automated testing, code review ...

data grounding infrastructure using RAG (Retrieval‐Augmented Generation), vector databases, search indexes, and knowledge bases to supply agents with accurate enterprise context. Enterprise Integration & API Management: Develop and maintain custom APIs (REST, GraphQL, webhooks) and integration pipelines connecting AFO/Agentforce to Salesforce Data Cloud (Data 360), cloud warehouses … Deep experience with LLM orchestration, prompt tuning, and building RAG pipelines, vector search indexes, and knowledge base retrievers for enterprise data. Multi‐Agent Systems & API Mastery: Practical experience with API design (REST/SOAP/webhooks) and modern agent protocols (e.g., MCP, tool calling, or event‐driven ...

data grounding infrastructure using RAG (Retrieval-Augmented Generation) , vector databases, search indexes, and knowledge bases to supply agents with accurate enterprise context. Enterprise Integration & API Management: Develop and maintain custom APIs (REST, GraphQL, webhooks) and integration pipelines connecting AFO/Agentforce to Salesforce Data Cloud (Data 360), cloud warehouses … Deep experience with LLM orchestration, prompt tuning, and building RAG pipelines, vector search indexes, and knowledge base retrievers for enterprise data. Multi-Agent Systems & API Mastery: Practical experience with API design (REST/SOAP/webhooks) and modern agent protocols (e.g., MCP, tool calling, or event-driven ...

making the call when one is needed Build and maintain customer-facing features end-to-end across APIs, backend services, and data models Design and evolve database schemas and data models that support our client‐side app Develop scalable, secure APIs that power our product's application experiences Partner … Data to translate user needs and designs into technical solutions — contributing your own point of view, not just executing Speak up in planning, design, and code reviews — raise concerns early and challenge assumptions Identify and resolve production issues through effective debugging and root‐cause analysis Build and maintain monitoring ...

Enterprise Platform, you are the strategic technical advisor who helps enterprise customers understand the full potential of our Enterprise AI products (such as Model API) and design the right architectures to unlock that value. You combine deep knowledge of Generative AI with enterprise architecture expertise and effective communication … discovery through successful deployment, ongoing adoption, and expansion. This role combines pre-sales technical leadership with post-sales customer adoption and expansion. You will design scalable architectures, develop evaluation frameworks, create reference implementations, and serve as the technical authority that gives customers and internal stakeholders the confidence to purchase ...

customise, and enhance a WordPress/WooCommerce-based marketplace platform Build core features such as quote request systems, supplier matching, and order workflow management Design and implement scalable backend services supporting marketplace operations Frontend & User Experience Develop responsive, high-quality user interfaces using modern JavaScript frameworks (e.g., React ) Optimise … driven capabilities such as visual search and pricing optimisation into the platform Collaborate on the implementation of intelligent features that enhance procurement decision‐making API & System Integration Design, develop, and maintain RESTful APIs Integrate third‐party services including payment gateways , compliance verification systems, and analytics tools Implement secure ...

from React front ends to Node/Python APIs and AWS infrastructure. You'll own features end to end, work closely with product and design, and help keep code quality and release pace healthy. This is a new role created to support the tight timeline for Lender Finance … prevent team burnout. Role & Responsibilities Build, test and ship features across front end and back end Design and maintain REST APIs and database schemas Turn requirements from product and design into working software Review code and keep quality and security standards high Deploy and monitor services on cloud ...

maintain high standards of engineering quality.**How you will make an impact*** Build and maintain reliable JVM-based services using Kotlin or modern Java.* Design and develop well-structured APIs and integrations.* Build reusable services, APIs and components that enable other teams to deliver consistently and reduce duplication.* Contribute … API design standards, documentation and versioning across services.* Deliver complete end-to-end features by connecting backend services and data models with responsive web interfaces.* Use appropriate test-first and test-informed practices to create effective automated tests.* Experiment with AI-assisted engineering tools where they provide clear ...

maintain high standards of engineering quality.**How you will make an impact*** Build and maintain reliable JVM-based services using Kotlin or modern Java.* Design and develop well-structured APIs and integrations.* Build reusable services, APIs and components that enable other teams to deliver consistently and reduce duplication.* Contribute … API design standards, documentation and versioning across services.* Deliver complete end-to-end features by connecting backend services and data models with responsive web interfaces.* Use appropriate test-first and test-informed practices to create effective automated tests.* Experiment with AI-assisted engineering tools where they provide clear ...

openly, and taking pride in delivering software that makes a real business impact. What You'll Do As a Senior Backend Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Kotlin and Spring Boot Lead technical design and architectural discussions, ensuring solutions … have strong commercial experience with: Spring Boot and the wider Spring ecosystem Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...